package com.lxg.reggie.config;

import com.lxg.reggie.common.JacksonObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

/**
 * @author 陆小根
 * date: 2022/05/10
 * Description:
 */
@Slf4j
@Configuration
public class WebMvcConfig extends WebMvcConfigurationSupport {

  /**
   * 设置静态资源映射
   * @param registry
   */
  @Override
  public void addResourceHandlers(ResourceHandlerRegistry registry) {
    log.info("开始处理静态资源映射....");
    registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/backend/");
    registry.addResourceHandler("/front/**").addResourceLocations("classpath:/front/");
  }

  @Override
  protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
    log.info("扩展消息转换器..");
    // 创建消息转换器对象
    MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();
    // 设置对象转换器，底层使用Jackson将Java对象转为Json
    messageConverter.setObjectMapper(new JacksonObjectMapper());  // 自定义的消息转换器 主要是为了解决Long精度损失的问题
    // 将上面的消息转换器对象追加到mvc框架的转换器集合中
    converters.add(0, messageConverter);
  }


}
